The Kara-Suu () or () is a right tributary of the Naryn in Aksy District, Jalal-Abad Region, Kyrgyzstan. The river originates in the Chatkal Range, western Tian Shan mountains. It flows through the villages Chaldybar and Jangy-Jol. The river discharges into the Naryn north of Tash-Kömür. It is long, and the average yearly discharge is . The Kara-Suu's peak flow is in May, and the minimum flow in January. The basin area is . The main tributaries are Ak-Jol, Turduk, Avletim, and Kojata. The lake is located at 2022 meters above sea level.